The historical use of physical model testing in wind engineering / Bill Addis
| Signatura | Copia | Colección |
|---|---|---|
| 13227 | Capítulo en monografía |
The first experiments to determine the force of the wind were undertaken in the eighteenth century by John Smeaton and his rules were used well into the twentieth century. The first attempts to measure such forces using models were in the 1890s, at the same time that wind tunnels were first used to study the lift and drag on flying machines. Early models were all of modest buildings and the main interest was in negative pressures on sloping roofs and the lee‐side of buildings. The first major high‐rise building to be tested was the Empire State building in New York, a model of which was tested in an aircraft wind tunnel.
The use of wind tunnels to study the behaviour of long‐span bridges was triggered by the dramatic collapse of the Tacoma Narrows bridge in 1940. Following an intense period of research, by 1950 it was effectively a requirement in designing long‐span bridges to test a section of the deck in a wind tunnel to ensure it would not be excited into torsional oscillation by eddies shed from the down‐wind edges.
By the mid‐1960s it was realised that the earth's natural and built‐up surface had a great influence on flow in the boundary layer – it was turbulent not streamlined. To study the effects of wind on structures to a much greater accuracy than hitherto, the British engineer Alan Davenport built the first boundary‐layer wind tunnel at the University of Western Ontario in Canada in 1965
| Localización permanente | Código de barras | |
|---|---|---|
| Fundación Juanelo Turriano | 13227 |
The first experiments to determine the force of the wind were undertaken in the eighteenth century by John Smeaton and his rules were used well into the twentieth century. The first attempts to measure such forces using models were in the 1890s, at the same time that wind tunnels were first used to study the lift and drag on flying machines. Early models were all of modest buildings and the main interest was in negative pressures on sloping roofs and the lee‐side of buildings. The first major high‐rise building to be tested was the Empire State building in New York, a model of which was tested in an aircraft wind tunnel.
The use of wind tunnels to study the behaviour of long‐span bridges was triggered by the dramatic collapse of the Tacoma Narrows bridge in 1940. Following an intense period of research, by 1950 it was effectively a requirement in designing long‐span bridges to test a section of the deck in a wind tunnel to ensure it would not be excited into torsional oscillation by eddies shed from the down‐wind edges.
By the mid‐1960s it was realised that the earth's natural and built‐up surface had a great influence on flow in the boundary layer – it was turbulent not streamlined. To study the effects of wind on structures to a much greater accuracy than hitherto, the British engineer Alan Davenport built the first boundary‐layer wind tunnel at the University of Western Ontario in Canada in 1965
